• Title, Summary, Keyword: stabilizer

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Analyzing Materials Property using Optical Sensing Technique of Stabilizer Link for Automobile Parts (수송기계용 Stabilizer Link의 광센서를 이용한 부품성능평가)

  • Nam, K.W.;Woo, Y.M.;Oh, J.H.;Moon, C.K.
    • Journal of the Korea Society For Power System Engineering
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    • v.14 no.6
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    • pp.47-53
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    • 2010
  • A stabilizer link connects the stabilizer bar to the lower arm of the suspension. When a vehicle is turning, lateral forces from the tire are transmitted through the stabilizer link into the stabilizer bar. The stabilizer bar will twist, thus adding rigidity to the vehicle body. In this study, the stabilizer link body was manufactured by using composite material with POM-GF25%. Therefore, the strength evaluation of stability link body with composite material carried out from tensile, wear and fatigue test. The tensile strength between the stability link body with composite material and the rod with knurling was the largest of four types of rod. In Analyzing materials property using optical sensing technique of stabilizer link for automobile parts, its has been identified the safety.

A Study of Asbestos Stabilizer Treatment Considering the Actual Environment of Ceiling Materials (실제 환경을 고려한 천장텍스의 석면안정화제 처리 연구)

  • Shin, Hyungyoo;Choi, Youngkue;Jeon, Boram;Ha, Jooyeon;Sun, Yleshik;Park, Whame
    • Journal of Korean Society of Occupational and Environmental Hygiene
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    • v.26 no.2
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    • pp.139-146
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    • 2016
  • Objectives: This study aimed to confirm the optimal processing conditions of the asbestos stabilizer by considering various actual environments at the time of stabilization treatment of the ceiling materials containing asbestos with asbestos stabilizer. Methods: The anti-scattering performances of the asbestos stabilizer were confirmed by considering the method and quantity of the asbestos stabilizer treated, comparing the loss weight by measuring the weight of ceiling materials prior to and after having treated 30, 50, 100, 200, and 400 of stabilizer using the brush and spray. The effects of backside dust and steel frame structure on the performances of the stabilizer was also confirmed by comparing samples with and without the dust on the rear surface removed by wiping the ceiling material specimens and the blinding treatment simulated by using tape. Results: The asbestos stabilization treatment using the brush method in comparison with the use of a spray has reduced stabilizer loss, resulting in better anti-scattering performance. In addition, the stabilizer loss is increased with increasing treatment quantity; as a result, treating a larger quantity of stabilizer does not improve the performance. For the conditions related to ceiling materials, the anti-scattering performance is enhanced by removing the backside dust and spreading the stabilizer evenly on the masking portion by steel frame structures. Conclusions: Based on these results, it is determined that the appropriate choice of the tool used for the treatment of the asbestos stabilizer and the appropriate quantity of asbestos stabilizer were needed at the time of actual stabilization processing of the ceiling materials containing asbestos. Moreover, this study confirmed that preliminary processing and verification of the structure at which the ceiling materials are installed can enhance the effectiveness of prevention of the scattering of asbestos into the air.

Relationships between Free Gaps and Abnormal Noises of Vehicle Stabilizer Links (차량용 스테빌라이져 링크의 유격과 이상소음 발생의 상관관계)

  • Han, Changwan;Kim, Hanjong;Yoo, Young-Jae;Park, Seonghun
    • Transactions of the Korean Society of Automotive Engineers
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    • v.25 no.1
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    • pp.28-34
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    • 2017
  • The vehicle stabilizer link is one of the suspension components that reduces the bumping and rolling during vehicle driving. However, this stabilizer link could be a source of the abnormal noises when its free gaps have higher than normal values. Therefore, the current study aims at investigating the quantitative relationships between the abnormal noises and free gaps of the vehicle stabilizer links, as well as the length of time that the vehicle stabilizer links could be used without generating abnormal noises. In this study, the abnormal noises were measured based on the magnitude of the stabilizer link vibration, while the free gaps were quantified through the force-displacement curves of the stabilizer links. Harsh durability tests were also conducted in order to quantify the operating cycles of the stabilizer links before generating the abnormal noises, along with the concomitant measurements of the free gaps. The current results showed that the abnormal noises of the stabilizer links were detected when its free gaps were larger than 0.12 mm. However, the free gaps of the stabilizer links, which are bigger than 0.1 mm, produced the abnormal noises at 1.5 million cycles under harsh durability test conditions. A parametric study in the future that would reflect the different shapes and sizes of the stabilizer links for diverse vehicles could determine more generalized relationships between the abnormal noises and free gaps of the vehicle stabilizer links.

Experimental Study on the Surface Pressure Characteristics of a Rear-Guider for the Various Design Factors of a Cross-Flow Fan (관류홴의 설계인자 변화에 따른 리어가이더의 표면압력 특성에 관한 실험적 연구)

  • Kim, J.K.
    • Journal of the Korea Society For Power System Engineering
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    • v.9 no.3
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    • pp.50-57
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    • 2005
  • A cross-flow fan is strongly influenced by the various design factors of a rear-guider and a stabilizer. The purpose of this paper is to investigate the effects of a rear-guider and a stabilizer on the surface pressure of a rear-guider in an indoor room air-conditioner using a cross-flow fan. The design factors considered in this paper are a rear-guider clearance, a stabilizer clearance, and a stabilizer setup angle, respectively. The operating condition of a cross-flow fan was controlled by changing the static pressure and flowrate using a fan tester. All surface pressures of a rear-guider are differently distributed according to the stabilizer setup angle, and show a zero value in the flow coefficient, ${\Phi}{\fallingdotseq}0.5$ only of a stabilizer setup angle, $45^{\circ}$. Especially, they show a big negative value in the expansion angle larger than $34^{\circ}$ regardless of a rear-guider clearance, a stabilizer clearance, and a stabilizer setup angle. On the other hand, surface pressures for various stabilizer cutoff clearances are better than those for various rear-guider clearances.

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Effects of an actuator attached to roll stabilizer bar on vehicle performance (롤안정바에 부착된 엑츄체이터가 차량의 성능에 미치는 영향 분석)

  • Sung, In-Chol;Kim, Keun-Soo;Yoo, Wan-Suk
    • Proceedings of the KSME Conference
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    • pp.649-654
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    • 2000
  • To analyze the effects of the front and rear roll stabilizer bar, five different models of roll stabilizer bar are simulated in this paper. It is shown that the stiffness change of the roll stabilizer bar is an effective way to alter the vehicle's roll gradient. Attaching an actuator at the roll stabilizer bar the vehicle's roll gradient can be controlled within error limits.

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Performance Analysis of Stabilizer Fin Applied Coanda System (코안다 시스템이 장착된 안정기용 핀의 성능해석)

  • Seo, Dae-Won;Lee, Se-Jin;Oh, Jungkeun
    • Journal of Ocean Engineering and Technology
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    • v.30 no.1
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    • pp.18-24
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    • 2016
  • Stabilizer fins are installed on each side of a ship to control its roll motion. The most common stabilizer fin is a rolling control system that uses the lift force on the fin surface. If the angle of attack of a stabilizer fin is zero or the speed is zero, it cannot control the roll motion. The Coanda effect is well known to generate lift force in marine field. The performance of stabilizer fin that applies the Coanda effect has been verified by model tests and numerical simulations. It was found that a stabilizer fin that applied the Coanda effect at Cj = 0.085 and a zero angle of attack exactly coincided with that of the original fin at α = 26°. In addition, the power needed to generate the Coanda effect was not high compared to the motor power of the original stabilizer fin.

A Study on the Parameters Tuning Method of the Fuzzy Power System Stabilizer Using Genetic Algorithm and Simulated Annealing (혼합형 유전 알고리즘을 이용한 퍼지 안정화 제어기의 계수동조 기법에 관한 연구)

  • Lee, Heung-Jae;Im, Chan-Ho
    • The Transactions of the Korean Institute of Electrical Engineers A
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    • v.49 no.12
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    • pp.589-594
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    • 2000
  • The fuzzy controllers have been applied to the power system stabilizer due to its excellent properties on the nonlinear systems. But the design process of fuzzy controller requires empirical and heuristic knowledge of human experts as well as many trial-and-errors in general. This process is time consuming task. This paper presents an parameters tuning method of the fuzzy power system stabilizer using the genetic algorithm and simulated annealing(SA). The proposed method searches the local minimum point using the simulated annealing algorithm. The proposed method is applied to the one-machine infinite-bus of a power system. Through the comparative simulation with conventional stabilizer and fuzzy stabilizer tuned by genetic algorithm under various operating conditions and system parameters, the robustness of fuzzy stabilizer tuned by proposed method with respect to the nonlinear power system is verified.

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Experimental Study on the Aerodynamic Performance Characteristics for Various Design Factors in the Maximum Flowrate Range of a Cross-Flow Fan (관류홴의 최대유량역에서 설계인자 변화에 따른 공력성능 특성에 관한 실험적 연구)

  • Kim, J.K.
    • Journal of the Korea Society For Power System Engineering
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    • v.9 no.3
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    • pp.44-49
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    • 2005
  • The aerodynamic performance of an indoor room air-conditioner using a cross-flow fan is strongly influenced by the various design factors of a rear-guider and a stabilizer. The purpose of this study is to investigate the effects of a rear-guider and a stabilizer on the aerodynamic performance in the maximum flowrate range of a cross-flow fan. The design factors considered in this study are a rear-guider clearance, a stabilizer cutoff clearance, and a stabilizer setup angle, respectively. Aerodynamic performances including maximum flowrate and power show the biggest magnitude distribution in the case of $45^{\circ}$, the stabilizer setup angle as well as nearly similar magnitude distribution regardless of the stabilizer cutoff clearances. Moreover, the more a rear-guider clearance increases, the more the magnitude of maximum flowrate and power increases.

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Analysis of eddy current loss in high-Tc superconducting power cables with respect to various structure of stabilizer (초전도 전력 케이블에서의 stabilizer의 형태에 따른 와전류 손실 해석)

  • Choi S. J.;Song M. K.;Lee S. J.;Sim K. D.;Cho J. W.
    • Progress in Superconductivity
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    • v.7 no.1
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    • pp.83-86
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    • 2005
  • The High-Tc superconducting power cable consists of a multi-layer high-Tc superconducting cable core and a stabilizer which is used to bypass the current at fault time. Eddy current loss is generated in the stabilizer in normal operating condition and affects the whole system. In this paper, the eddy current losses are analyzed with respect to various structure of stabilizer by using opera-3d. Moreover, optimal conditions of the stabilizer are derived to minimize the eddy current losses from the analyzed results. The obtained results could be applied to the design and manufacture of the high-Tc superconducting power cable system.

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A Study of the Gain Margin in Accordance with the PSS Inputs (PSS 입력신호에 따른 이득여유 연구)

  • Kim, Dong-Joon;Moon, Young-Hwan;Kim, Tae-Kyun;Shin, Jeong-Hoon;Kim, Yong-Hak
    • Proceedings of the KIEE Conference
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    • pp.1060-1062
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    • 1999
  • This paper proposes a guideline of choosing the optimum stabilizer input considering the gain margin of power system stabilizer between the optimum stabilizer gain and the allowable maximum stabilizer gain in accordance with the five inputs, such as generator shaft speed, bus frequency, electrical power, accelerating power and bus terminal voltage. The local mode damping and exciter mode damping are considered with increasing the stabilizer gain to determine each gain margin of the inputs.

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